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Query: UMLS:C0019693 (HIV)
 170,526 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Since alterations of epidermal Langerhans cells (LC) have been observed in humans infected with HIV, we investigated the morphology and function of these cells in murine acquired immunodeficiency syndrome (MAIDS), a murine model closely resembling human AIDS. The number as well as the shape of dendritic MHC class II+ cells from ear skin of C57BL/6 mice were similar in normal and infected animals. In mixed epidermal cell (EC) lymphocyte cultures, EC from infected mice and from normal mice stimulated allogeneic T cell proliferation to the same extent. In contrast to T cells from normal mice, however, T cells from infected mice did not respond to allogeneic spleen cells, confirming the presence of a T-cell defect in MAIDS. Subcutaneous injection of syngeneic mice with trinitrophenyl-modified MAIDS EC resulted in delayed ear swelling responses after challenge that were equivalent to those induced by hapten-modified EC from normal mice, suggesting that the contact sensitivity inducing potential of MAIDS LC was preserved. To investigate antigen presenting and processing function, EC and spleen cells were tested with the ovalbumin-specific IAb-restricted T cell hybridoma BO.17.10 and either ovalbumin 323-339 peptide or intact ovalbumin protein. MAIDS spleen cells had a reduced antigen presenting capacity compared with normal spleen cells, whereas EC from these mice showed the same processing and presenting capacity as normal controls. In summary, our results demonstrate that the frequency, morphology, level of MHC class II antigen expression and ability to process and present antigen is normal for LC from mice with MAIDS whereas the function of splenic T cells and APC from infected mice is significantly impaired.
Arch Dermatol Res 1992
PMID:Epidermal and splenic antigen-presenting cell function in a retrovirally induced murine immunodeficiency syndrome (MAIDS). 132 74

Eosinophilic pustular folliculitis is a rare condition which is being increasingly reported in HIV-positive patients. Many therapies have been used to treat this condition. We report the first successful use of the H1 antihistamine cetirizine to treat the condition and postulate that the specific antieosinophilic action of this drug may explain the beneficial clinical effect seen in our patient.
Br J Dermatol 1992 Apr
PMID:Eosinophilic pustular folliculitis in an HIV-positive man: response to cetirizine. 134 34

The AIDS epidemic has become a world-wide health problem since the disease was identified ten years ago. An HIV-dermatology outpatient clinic was established at the Albion Street Centre in Sydney to manage patients with cutaneous manifestations of AIDS. This study reviews the spectrum of skin disorders seen, and attempts to correlate skin disease with the degree of immunosuppression as reflected by CD4 or T helper lymphocyte counts, whereas previous reports have attempted to correlate skin disease with clinical signs and symptoms. Brief summaries of HIV disease and the cutaneous manifestations of AIDS are given.
Australas J Dermatol 1992
PMID:HIV infected patients: correlation of cutaneous disease with degree of immunosuppression. 136 57

Sera from 16 patients suffering from active psoriasis without arthropathy (2 guttate, 10 nummular, and 4 mixed type) were examined for the presence of circulating immune complexes. Five routine laboratory assay systems were used, based on C1q-binding or detection of IgG-coupled C1q and C3-breakdown products. In 14 patients, no elevated levels of circulating immune complexes were detected. One patient, who additionally suffered from late-phase HIV-1 infection, showed C1q-binding activities as well as levels of IgG-coupled C1q and C3-breakdown products in four of the assay systems, which indicated the presence of immune complexes in his serum. In another patient, with nummular psoriasis, slightly elevated levels of circulating immune complexes were measured by two of the assay systems. These results question the hypothesis of an essential pathogenic role of circulating immune complexes in psoriasis.
Exp Dermatol 1992 Oct
PMID:Circulating immune complexes in patients with psoriasis: do they exist? 136 14

Localized granuloma annulare is the commonest form of a granulomatous dermatosis characterized by flesh coloured or violaceous papules often arranged in rings. Several rare atypical variants are also reported including disseminated or generalized, subcutaneous and perforating types. There is a predilection for females and a documented association with diabetes mellitus in some cases. Recently it has been suggested that atypical variants of granuloma annulare might be associated with the acquired immunodeficiency syndrome (AIDS). We describe a patient presenting with extensive generalized granuloma annulare in whom an underlying diagnosis of Human Immunodeficiency Virus (HIV) disease was confirmed.
Clin Exp Dermatol 1992 Jan
PMID:Disseminated granuloma annulare as a presentation of acquired immunodeficiency syndrome (AIDS). 142 65

Many details of the pathogenesis of the human immunodeficiency virus type 1 remain to be elucidated. Details of how the virus gains entry via the mucosal surface upon sexual contact or during breast feeding remain obscure. The means by which the infection travels throughout the body as well as the nature of the major reservoirs of virus infection remains, for the most part, unknown. Recent studies raise the possibility that cells of the Langerhans/dendritic lineage play a central role in human immunodeficiency virus (HIV-1) infection and pathogenesis. It has been known for several years that veiled dendritic cells in the circulation as well as skin Langerhans are infected in people with prolonged HIV-1 infections. More recently it has been found that a large burden of viral DNA sequences is found, not only in the circulating T-cell population, but also in a population that is defined as a non-T, non-B, non-monocyte/macrophage population rich in T-helper dendritic cells. Detailed analysis of infection of primary blood-derived T-helper dendritic cells by HIV-1 shows that such cells are the most susceptible cells in the blood to infection by this virus. The cells also produce much more virus per cell than do purified populations of other blood mononuclear cells. Moreover, primary blood-derived T-helper dendritic cells are not killed by infection by HIV-1. These cells are susceptible to lymphotropic, monocyte tropic, and primary isolates of HIV-1. The sensitivity of primary blood-derived T-helper dendritic cells to infection by HIV-1 has been shown to be attributable to rapid uptake of virus particles as well as rapid synthesis of viral DNA. Subsequent steps of virus replication also occur more rapidly and more efficiently in populations of primary blood-derived T-helper dendritic cells than they do in purified preparations of blood-derived T cells and monocyte/macrophages. Studies with primates using the simian immunodeficiency virus (SIV) show that dendritic cells at the surface of sexual mucosa are rapidly infected upon exposure to high concentrations of the virus. SIV is also produced in abundance in Langerhans cells located at the surface of the sexual mucosa in animals infected for prolonged periods of time.
J Invest Dermatol 1992 Nov
PMID:Infection of accessory dendritic cells by human immunodeficiency virus type 1. 143 Dec 41

We report the case of a 28-year-old homosexual man with advanced HIV disease (CDC classification group IV A) who developed erythrodermic psoriasis which responded to calcipotriol, a topical vitamin D analogue. We believe this to be the first reported case of HIV-related psoriasis responsive to this form of treatment. Systemic therapy for HIV-related psoriasis is limited because of immunosuppressive effects. We suggest that calcipotriol may prove to be a useful therapeutic option in these patients.
Clin Exp Dermatol 1992 Sep
PMID:The use of calcipotriol in HIV-related psoriasis. 145 40

We report the case of a 25-year-old, HIV-positive patient (group IV, A, C2 clinical stage) with a widespread dermatophyte infection. He was a male gypsy with a known history of intravenous drug abuse. After an episode of cerebral toxoplasmosis for which he was treated with systemic steroids (because of cerebral oedema) he developed, over 16 days, a remarkably extensive ringworm of the trunk due to an unusual zoophilic dermatophyte, Microsporum (Trichophyton) gallinae. Human infection with this dermatophyte species is unusual: there are as few as seven proven reported cases, all of whom had localized lesions. This is the first widespread and severe case reported in man and also the first reported from Spain.
Clin Exp Dermatol 1992 Nov
PMID:Widespread dermatophytosis due to Microsporum (Trichophyton) gallinae in a patient with AIDS--a case report from Spain. 148 16

Several questions remain unanswered including the timing of perinatal transmission, maternal factors predisposing to perinatal transmission of HIV-1, the best methods for early diagnosis in the neonate, and means of preventing perinatal HIV-1 infection. Significant advances have been made in the early diagnosis of HIV-1 infection, and now it is possible to make a diagnosis in most infants by 6 months of age. Unfortunately, not all these techniques are commercially available, so this capability is limited to certain institutions and laboratories. The natural history of HIV-1 infection in children continues to evolve, particularly with increased prophylaxis of P. carinii pneumonia and the availability of antiretroviral therapy. Our challenges for the future are to prevent perinatal transmission, to develop new and better therapies for opportunistic infections and HIV-associated complications, and to improve outcome and prognosis.
Pediatr Dermatol 1992 Dec
PMID:Pediatric HIV-1 infection: a clinical overview. 149 45

Porphyria cutanea tarda (PCT), a relatively uncommon disease, has recently been reported in patients infected with the human immunodeficiency virus (HIV). Although PCT and HIV infection may co-exist by chance, the increasing number of reported cases suggest that HIV or an associated factor triggers the development of PCT in predisposed individuals. We report four additional cases of PCT in HIV seropositive patients and review the previously reported cases. The possible links between PCT and HIV are discussed. We believe the diagnosis of PCT should prompt investigation for HIV infection in all patients.
Int J Dermatol 1992 Jul
PMID:Porphyria cutanea tarda and human immunodeficiency virus infection. 150 Feb 37


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